Explain the ASHRAE refrigerant safety designation regarding refrigerants toxicity and flammability
What will be an ideal response?
A – lower toxicity - requires more than 400 parts per million to be hazardous B- higher toxicity – requires less than 400 parts per million to be hazardous
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Describe the potential of tidal power, and explain why it is not likely to provide a large portion of our energy needs
What will be an ideal response?
The accompanying figure represents the ____ lettering and numerals.
A. digifont B. photofont C. microfont D. minifont
What lubricant should be used when mounting a tire?
A) SAE 10W-30 engine oil B) Grease C) Water-based soap D) Silicone spray
Transformers in which the primary and secondary voltages are 180 out of phase are known as _____
a. unlike-wound transformers b. like-wound transformers c. unequal transformers d. step-up transformers